Judd, Charles Hubbard <br/><br/>
Psychological Analysis of the Fundamentals of Arithmetic 

 - Chicago  The University of Chicago Press  1927 
 - ix, 121 p. 
<br/><br/> Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Sciences
<br/><br/><label>Dewey Class. No.: </label>511  / JUD